Reflexive pronouns are one of those grammar topics where worksheets tend to fail students because they test recognition instead of the actual logic behind the construction.
The basic mechanic is simple: a reflexive pronoun (myself, yourself, himself, herself, itself, ourselves, yourselves, themselves) must refer back to the subject of its own clause. It is not interchangeable with an object pronoun just because it sounds formal. "She blamed herself" means she blamed her own self. "She blamed her" means someone or something else she. The reflexive form encodes an identity relationship between two positions in a sentence. That is the only thing that matters most of the time. I spend a lot of time designing these because I keep seeing the same mistake in published materials. The sentences are chosen to sound natural but they accidentally allow both a reflexive and a non-reflexive reading, which makes the exercise ambiguous. Here is how I approach it instead. Start with the two subcategories and keep them separate. True reflexives require the reflexive form because the object position refers back to the subject with no other possible antecedent in the clause. Emphatic reflexives are used for focus and can usually be removed without breaking the sentence. Most worksheets mash these together and that is where confusion starts.
Fill-in-the-blank items should be anchored in clear context, not presented as isolated sentences. I write prompts like "My brother cut ___ while making coffee" because the action of cutting inherently targets the subject's own body part in this context. The student has to infer the reflexivity from the situation, not from a rule they memorized. That distinction is the whole point of the exercise. Include a small set of items that test emphatic reflexives separately. "I myself baked this entire cake" carries a different meaning than "I baked this entire cake." The reflexive here adds emphasis, not a required grammatical relationship. Students who cannot distinguish these two functions will overuse reflexives everywhere and sound unnatural. The answer key needs brief explanations for tricky items, not just the correct word. When a student sees "they told ___ they were wrong," the explanation should note that this could technically be either "themselves" or "them" depending on context, and that the worksheet item assumes the reflexive reading because of the reported-speech structure. Without that note, high-performing students get confused by what looks like an ambiguous question.
I once spent an afternoon debugging a worksheet item where the sentence was "The children dressed ___ for the party." Half my students answered "them" because they read it as someone else dressing the children, not as the children dressing themselves. The intended answer was "themselves," but the sentence structure did not make that clear enough. I rewrote it as "The children dressed ___ for the party before going out" to force the reflexive reading through temporal context. That single addition fixed the ambiguity without changing the difficulty level. For the advanced section, throw in the cases where reflexives appear without an obvious subject-object identity relationship. In British English, you will hear "He gave himself a promotion" or "She made herself a cup of tea," where the reflexive functions almost like a dative or possessive marker. These are idiomatic in certain dialects and standard American English prefers the non-reflexive versions. A worksheet that presents these without noting the regional variation will confuse anyone learning for international contexts. Another common trap is the reciprocal construction. "They looked at each other" is not reflexive. Some worksheets treat "each other" and "one another" as reflexive because they involve mutual reference, but they are a separate category entirely. Mixing them into a reflexive pronoun exercise introduces noise that does not belong there. Keep reciprocals out or put them in a separate section.
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The biggest limitation of any reflexive pronoun worksheet is that it can only train pattern recognition. Once a student can fill in the blanks correctly, the worksheet has done its job. It cannot teach them when reflexives sound natural in spontaneous speech or writing. That requires reading and listening practice with authentic material. A worksheet is a diagnostic and reinforcement tool, not a complete solution. If a student scores 95% on a reflexive pronoun exercise but still writes "She talked to her in the mirror instead of herself" in their essays, the worksheet was not the bottleneck. The bottleneck is the lack of exposure to how the form actually behaves outside of exercises. For that reason, I recommend pairing the worksheet with a short paragraph where students identify every reflexive and categorize it as true reflexive or emphatic. That second step forces them to apply the distinction instead of just matching verb patterns to pronoun forms. The combined exercise takes about twenty minutes and covers more ground than a thirty-question blank-filling sheet.