Solve your own exercises
An exercise you made — by hand, or from a position read out of a book — is not only something to send. You can solve it yourself, and the app checks your answer exactly as it checks a student's homework.
Where the exercises come from
An exercise is a position with a task. Yours are in the Library on Teach, under the Exercises chip: New exercise makes one on a board of your own, and Make exercise turns a saved position, or one from a book, into one. How positions get there is on prepare material.
The task decides how it is solved. Find the move is answered with one move. Win, Draw or better and Play N moves are played out as a game against the engine.
Find the move: My exercises
Once you have a Find the move exercise, Practise has a My exercises card, and its Solve serves every one that is waiting: first the ones you have never tried, then the ones you got wrong the last time. One you solved does not come back here. When nothing is waiting the button is greyed.
Play your move on the board. One move is your answer, and the board takes no second one: the verdict is Correct, or Not quite and the solution. Where the task is a mate, any mate counts, not only the one in the book. Next unsolved goes on, and the last one says Finish. Open under the verdict opens the exercise itself, to read it or change it.
When you have got some wrong, the card has Retry failed with their number, which serves only those. The line on the card that counts what you solved opens the list of every exercise you tried, with the rest of your puzzles — every puzzle you tried — where Try again puts any one of them in front of you, solved or not.
One exercise at a time, from the Library
On an exercise's card in the Library, Solve does the same for that one exercise. An exercise played as a game has Play instead: you play the task out against the engine, and at the end the app says Goal met or Goal not met, judged by the rules or, where the game stopped short of its end, by the tablebase. If the tablebase does not answer, it says so, and the game does not count. Play N moves has no goal for anything to judge: alone it says Played, and counts toward nothing.
Solving and sending
Solving an exercise yourself changes nothing about it: you can still send it with Assign to student, and a student's answers are counted for the student, not for you. Your own are counted on the My exercises card and in My puzzles.
The rest of the Practise tab is on practise on your own.