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May
9
answered Correct usage of “behind schedule”
May
2
revised Why do you say 我没有错 instead of 我不错 to say “I'm not wrong”? When should I use 没有?
deleted 1 characters in body
May
2
revised Why do you say 我没有错 instead of 我不错 to say “I'm not wrong”? When should I use 没有?
added 2 characters in body
May
2
answered Why do you say 我没有错 instead of 我不错 to say “I'm not wrong”? When should I use 没有?
Apr
25
revised What's the difference between 了, 著 and 到 when used as verb complements?
added 17 characters in body
Apr
25
revised What's the difference between 了, 著 and 到 when used as verb complements?
added 81 characters in body
Apr
25
revised What's the difference between 了, 著 and 到 when used as verb complements?
added 196 characters in body
Apr
25
revised What's the difference between 了, 著 and 到 when used as verb complements?
added 196 characters in body
Apr
25
comment What's the difference between 了, 著 and 到 when used as verb complements?
@OlleLinge: sorry, I made a mistake. Corrected it already.
Apr
25
revised What's the difference between 了, 著 and 到 when used as verb complements?
added 52 characters in body
Apr
25
revised What's the difference between 了, 著 and 到 when used as verb complements?
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Apr
24
revised What's the difference between 了, 著 and 到 when used as verb complements?
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Apr
24
revised What's the difference between 了, 著 and 到 when used as verb complements?
added 1 characters in body
Apr
24
answered What's the difference between 了, 著 and 到 when used as verb complements?
Apr
18
answered What are the characters on this image, and what do they translate to?
Apr
18
revised Stroke order for 印
added 431 characters in body
Apr
18
reviewed Approve Stroke order for 印
Apr
17
revised Stroke order for 印
added 5 characters in body
Apr
17
answered Stroke order for 印
Apr
16
comment Adding tone marks to characters
Back to your question, I think you need to get your students able to read pinyin correctly, then give them texts with pinyin on each character. When they have mastered enough basic characters (100~200 maybe), then give them texts without pinyin. I don't know any tools which can put tone marks only on characters. One thing to consider: some characters are polyphones (probably different tones), and the tool, if any, won't know which tone mark to choose. If wrong tone marked on characters, it will mislead or cause confusions.