Given that you want to review/study the words that have already in your course, but categorized in a different way, the methode below might be helpful in combination with the solution above.
When create a new level, you can add words that also exist in other levels. Have you learned/reviewed them in a previous level, they will also be marked as learned in that other level, as that are just another pointer to the same record.
Create a new level for the new category, for example ‘words for at school’: Just add a new word by typing, e.g. ‘table’. Memrise will search for table in the database. If you then click on the + in front of table, it will add it from the database, rather than adding a new one. In pictures:
E.g. you have already a level with the word Book:
Now you want to make a level with specifically words for school to review only school-words. Create a new level, and type ‘book’ in the ‘add’ field. See picture:
Choose the top one (if there are two, usually the first one is the one in your own database, and the second one in the database that comes with it when you create the course - it’s a little confusing sometimes, but that is how it is). After clicking the big plus, you’ll get this:
You see, the attributes are exactly the same as in level one. It’s the same record, it’s simply made accessible from level 9 as well now.
Let me know if this helps your learning situation.
You can also add the words using ‘Bulk Add’, for example because you have them already in Excel. In that case, make sure that the text in both the foreign language and English column is exactly as in the database. If only one character is different, it would create a new record (which you then need to delete manually from the database). I always test this with 1 or 2 words first to make sure it works right.
Note: If you press accidentally ‘Enter’, it will create a new record, which you can only delete by going into the database; even if you remove it from the level with the Red X, it’s still sitting (as a ‘ghost’ as some ppl say here) in the database.