Scheme Track Management

This page provides the Exercism community with the information and tools needed to manage the Scheme track.

Students
3,734
Submissions
21,594
Mentoring Discussions
379

The Scheme track needs attention ⚠️

Building

Practice Exercises

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Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Synced primary repo: 8c036c94ceae6483ee3d42cc285ff0366630fb92 (Updates should be instant)

Next goal: Implement at least 40 practice exercises. Find out more.
39 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
2,372
4,014 (avg. 1.7)
1,666 (70.2%)
3 (0.1%)
Leap Leap
1,137
3,831 (avg. 3.4)
655 (57.6%)
110 (9.7%)
RNA Transcription RNA Transcription
557
2,770 (avg. 5.0)
310 (55.7%)
52 (9.3%)
Hamming Hamming
456
1,434 (avg. 3.1)
305 (66.9%)
64 (14.0%)
Grains Grains
340
1,677 (avg. 4.9)
258 (75.9%)
34 (10.0%)
Anagram Anagram
181
656 (avg. 3.6)
124 (68.5%)
15 (8.3%)
Difference of Squares Difference of Squares
248
659 (avg. 2.7)
204 (82.3%)
20 (8.1%)
Pascal's Triangle Pascal's Triangle
114
229 (avg. 2.0)
78 (68.4%)
12 (10.5%)
Knapsack Knapsack
68
192 (avg. 2.8)
31 (45.6%)
6 (8.8%)
Binary Search Binary Search
121
393 (avg. 3.2)
71 (58.7%)
5 (4.1%)
Two Fer Two Fer
216
473 (avg. 2.2)
171 (79.2%)
11 (5.1%)
Transpose Transpose
88
131 (avg. 1.5)
53 (60.2%)
3 (3.4%)
Forth Forth
62
250 (avg. 4.0)
27 (43.5%)
2 (3.2%)
Phone Number Phone Number
75
201 (avg. 2.7)
57 (76.0%)
3 (4.0%)
Raindrops Raindrops
114
199 (avg. 1.7)
100 (87.7%)
9 (7.9%)
Matching Brackets Matching Brackets
75
365 (avg. 4.9)
57 (76.0%)
3 (4.0%)
Perfect Numbers Perfect Numbers
51
187 (avg. 3.7)
39 (76.5%)
2 (3.9%)
Nucleotide Count Nucleotide Count
95
183 (avg. 1.9)
69 (72.6%)
3 (3.2%)
Scrabble Score Scrabble Score
93
164 (avg. 1.8)
74 (79.6%)
5 (5.4%)
Word Count Word Count
68
151 (avg. 2.2)
40 (58.8%)
4 (5.9%)
Pangram Pangram
58
172 (avg. 3.0)
44 (75.9%)
2 (3.4%)
Queen Attack Queen Attack
52
99 (avg. 1.9)
40 (76.9%)
2 (3.8%)
Atbash Cipher Atbash Cipher
54
136 (avg. 2.5)
40 (74.1%)
1 (1.9%)
Change Change
34
92 (avg. 2.7)
19 (55.9%)
2 (5.9%)
Collatz Conjecture Collatz Conjecture
75
154 (avg. 2.1)
61 (81.3%)
2 (2.7%)
Rotational Cipher Rotational Cipher
49
94 (avg. 1.9)
37 (75.5%)
0 (0.0%)
Prime Factors Prime Factors
42
63 (avg. 1.5)
27 (64.3%)
1 (2.4%)
Bob Bob
94
178 (avg. 1.9)
70 (74.5%)
8 (8.5%)
Affine Cipher Affine Cipher
37
107 (avg. 2.9)
26 (70.3%)
2 (5.4%)
Accumulate Accumulate
67
551 (avg. 8.2)
25 (37.3%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
55
218 (avg. 4.0)
39 (70.9%)
0 (0.0%)
Acronym Acronym
52
181 (avg. 3.5)
36 (69.2%)
0 (0.0%)
Octal Octal
39
81 (avg. 2.1)
31 (79.5%)
1 (2.6%)
Roman Numerals Roman Numerals
47
111 (avg. 2.4)
32 (68.1%)
0 (0.0%)
Strain Strain
46
121 (avg. 2.6)
35 (76.1%)
0 (0.0%)
Sum of Multiples Sum of Multiples
58
218 (avg. 3.8)
36 (62.1%)
0 (0.0%)
Triangle Triangle
61
368 (avg. 6.0)
44 (72.1%)
0 (0.0%)
Trinary Trinary
54
166 (avg. 3.1)
34 (63.0%)
2 (3.7%)
Sieve Sieve
56
246 (avg. 4.4)
28 (50.0%)
4 (7.1%)
2 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
List Ops List Ops
37
38 (avg. 1.0)
24 (64.9%)
3 (8.1%)
Robot Name Robot Name
28
41 (avg. 1.5)
24 (85.7%)
3 (10.7%)
90 unimplemented practice exercises
All Your Base All Your Base
Allergies Allergies
Alphametics Alphametics
Bank Account Bank Account
Binary Search Tree Binary Search Tree
Book Store Book Store
Bottle Song Bottle Song
Bowling Bowling
Circular Buffer Circular Buffer
Clock Clock
Complex Numbers Complex Numbers
Connect Connect
Crypto Square Crypto Square
Custom Set Custom Set
D&D Character D&D Character
Darts Darts
Diamond Diamond
Dominoes Dominoes
DOT DSL DOT DSL
Eliud's Eggs Eliud's Eggs
Error Handling Error Handling
ETL ETL
Flatten Array Flatten Array
Food Chain Food Chain
Gigasecond Gigasecond
Go Counting Go Counting
Grade School Grade School
Grep Grep
Hangman Hangman
High Scores High Scores
House House
ISBN Verifier ISBN Verifier
Isogram Isogram
Killer Sudoku Helper Killer Sudoku Helper
Kindergarten Garden Kindergarten Garden
Largest Series Product Largest Series Product
Ledger Ledger
Lens Person Lens Person
Linked List Linked List
Luhn Luhn
Markdown Markdown
Matrix Matrix
Meetup Meetup
Micro Blog Micro Blog
Minesweeper Minesweeper
Nth Prime Nth Prime
OCR Numbers OCR Numbers
PaaS I/O PaaS I/O
Palindrome Products Palindrome Products
Parallel Letter Frequency Parallel Letter Frequency
Pig Latin Pig Latin
Poker Poker
POV POV
Protein Translation Protein Translation
Proverb Proverb
Pythagorean Triplet Pythagorean Triplet
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
React React
Rectangles Rectangles
Resistor Color Resistor Color
Resistor Color Duo Resistor Color Duo
Resistor Color Trio Resistor Color Trio
REST API REST API
Reverse String Reverse String
Robot Simulator Robot Simulator
Run-Length Encoding Run-Length Encoding
Saddle Points Saddle Points
Satellite Satellite
Say Say
Secret Handshake Secret Handshake
Series Series
SGF Parsing SGF Parsing
Simple Cipher Simple Cipher
Simple Linked List Simple Linked List
Space Age Space Age
Spiral Matrix Spiral Matrix
Square Root Square Root
State of Tic-Tac-Toe State of Tic-Tac-Toe
Sublist Sublist
Tournament Tournament
Tree Building Tree Building
Twelve Days Twelve Days
Two Bucket Two Bucket
Variable Length Quantity Variable Length Quantity
Word Search Word Search
Wordy Wordy
Yacht Yacht
Zebra Puzzle Zebra Puzzle
Zipper Zipper

Programming Tags

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Help manage the tags used to group, filter and recommend solutions, approaches and articles.

0 tags

Test Runner

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Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Current version: b4d73fe90cb20cedd82a9f0ecd259f30910f94d2 (Takes up to 10 mins to deploy)

Total Test Runner Runs
20,408
Test Run Pass Rate
30.0% (6113)
Test Run Fail Rate
43.1% (8790)
Test Run Error Rate
27.0% (5505)

Representer

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Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Next goal: Build a Representer. Find out more.

Analyzer

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Build an Analyzer for Scheme: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.