River Stones
Stepping-stone arithmetic chains the same operation patterns trainees meet in school word problems. Mixing forks forces value tracking under decision load — a workout for mental arithmetic and working memory. Parameters adjust to the level and the task.
Example
A generated instance. Parameters such as difficulty, size, and symbol set are adjustable.
Task focus
Each task format is associated with these cognitive categories:
arithmetic abilities
Performing mathematical operations, understanding numbers and quantitative relations.
working memory
Temporary storage and manipulation of information for current tasks. Limited capacity (7±2 items).
attention
Ability to focus on relevant information and filter out distracting stimuli. Includes sustained, selective, and switching attention.
Evidence-informed format
Stepping-stone arithmetic chains the same operation patterns trainees meet in school word problems. Mixing forks forces value tracking under decision load — a workout for mental arithmetic and working memory.
Source: Stepping-stone arithmetic chain; mental-math practice
How to use it
- 1Open the exercise and adjust the difficulty to the student's current level — usually it is better to start slightly easier than feels right.
- 2Read the rules. They are short, usually 10–20 seconds.
- 3Use the generated task as structured educational material, with accuracy and clarity prioritized over speed.
- 4Compare the answer with the reference and leave a human-written comment if the task is assigned through the student cabinet.
Who it's for
- •Educators and tutors — as material for lessons, review, and home practice.
- •Speech, special-education, and development specialists — for children and adults; parameters adjust to the student's level.
- •Parents — to receive clear assignments and leave comments about completion.
Frequently asked
Can I practice without an account?
Yes. The River Stones exercise itself runs in your browser without an account. Sign-up is only needed if you work with clients or want to save progress between sessions.
What is the task focus of River Stones?
Primarily — arithmetic abilities, working memory and attention. The full list is in the section above, with short definitions for each function.
How long does one task take?
Most generated tasks are designed for short use in lessons, homework, or individual practice sets. The exact time depends on difficulty and student level.
Can I use River Stones with clients?
Yes. In BrainTrainings Academy, River Stones can be added to a worksheet set with difficulty controls, student assignment, completion time, and comments.