Yes, the crash course covers all three tiers of the SSC CHSL Exam.

The SSC CHSL (Staff Selection Commission Combined Higher Secondary Level) Exam is conducted in three tiers: Tier 1, Tier 2, and Tier 3. Each tier has its own specific subjects and topics that need to be covered in order to prepare for the exam. The crash course is designed to provide comprehensive coverage of all three tiers to help students prepare effectively.

Tier 1:
- The crash course covers all the subjects included in Tier 1 of the SSC CHSL Exam, which are General Intelligence, English Language, Quantitative Aptitude, and General Awareness.
- It provides detailed explanations and practice questions for each topic within these subjects.
- The course focuses on developing the necessary skills and strategies to tackle the different types of questions that may be asked in the exam.

Tier 2:
- The crash course also covers Tier 2 of the SSC CHSL Exam, which consists of a descriptive paper in English/Hindi.
- It provides guidance on how to improve writing skills, develop a proper structure for essays/letters, and enhance vocabulary and grammar.
- The course includes sample essays and letters, along with tips and techniques to effectively express ideas and opinions.

Tier 3:
- Tier 3 of the SSC CHSL Exam is a skill test/typing test that assesses the typing speed and accuracy of candidates.
- The crash course helps students prepare for this test by providing practice exercises and tips to improve typing speed and accuracy.
- It also covers the formatting and editing skills required for the skill test.

Overall, the crash course for SSC CHSL Exam covers all three tiers comprehensively, providing students with the necessary knowledge, skills, and practice to perform well in each tier of the exam.