About Shelby Joe

Shelby Joe 周 is the Founder of Piqosity. He has more than 20 years of experience in education as an entrepreneur, professor, and tutor. Shelby earned his BA in Political Science from Rice University. Born and raised in Mississippi, he now resides in Houston but has also lived in Beijing, Shanghai, and Hamburg.

TSI Assessment Practice Tests (TSIA2), Free & Full-Length

Piqosity now offers 12 full-length TSI practice tests, and they're currently available for free! Of the 12 TSI tests, 6 exams are English Language Arts and Reading (ELAR), and 6 exams are mathematics. Like the actual Texas Success Initiative Assessment 2 (TSIA2), each ELAR and Mathematics test features an adaptive logic that automatically routes [...]

By |2026-01-13T19:59:23-06:00January 13th, 2026|TSIA2|

AI-Graded Student Essays Updated

Piqosity integrates with ChatGPT to AI-grade student essays. Essay prompts are found throughout Piqosity including in standardized test prep courses like TSI, ACT, and ISEE plus our English Language Arts (ELA) courses for grades 5-11. Upon writing their essay and scoring the quiz, students will now see an AI-generated score and specific feedback. As [...]

By |2026-01-13T10:29:40-06:00January 13th, 2026|Piqosity News, ZPQA Org Admin, ZPQA Org Teacher, ZPQA Teacher|

How to Use This TSIA Prep Course

Here are some tips to prepare for the TSI Assessment 2 (TSIA2) using Piqosity's resources. Piqosity is an edtech company based in central Houston, which we think makes us uniquely positioned to help you ace your TSIA2. Whether you're preparing for the TSIA2, the ACT, SAT, or any standardized test, our general advice is [...]

By |2026-01-13T10:23:29-06:00January 13th, 2026|App Alerts, ZPQA TSIA|

How Long Should You Study for the ACT Test?

Every student, parent, and school administrator always asks, “How long does it take to improve an ACT or SAT score?” Asked to anyone else, the generic response that you’ll often get for this admittedly broad question is “experts say about 10-20 hours.” But who are these experts and what does that mean? Can every [...]

By |2026-01-12T14:30:52-06:00January 12th, 2026|ACT Test Prep|

How to Improve Reading Comprehension Skills for Standardized Tests Like ACT and SAT

English teachers will often tell you that the only way to improve your reading comprehension skills is to simply read more. While sound and well-intentioned, this advice probably isn’t very helpful if you must quickly improve your skills, for example earning a higher score on a standardized test like the ISEE, ACT or SAT. [...]

By |2025-12-29T14:25:27-06:00December 29th, 2025|ACT Test Prep, English, SAT Test Prep|

Free ACT Official Practice Test PDFs and Answer Explanations

This page contains professionally-written answer explanations to the freely available, official ACT practice tests floating around on the internet. Depending on the year, either the ACT or the SAT is the most popular college admissions test in the United States. In 2024, approximately 1.4 million students took the ACT in the [...]

By |2025-12-26T12:17:13-06:00December 26th, 2025|ACT Test Prep, ACT: Answer Explanations, College Resources, Favorites|

How to Tackle Word Problems on the ISEE Test

The entirety of the ISEE Upper Level Mathematics Achievement test is comprised of word problems, and much of the Quantitative Reasoning section is as well. Given that the Mathematics Achievement Test is the longest test on the ISEE test, and the Quantitative Reasoning test is generally considered the most challenging, it's a good idea [...]

By |2025-12-10T09:03:43-06:00December 10th, 2025|ISEE: Upper Level|

Answer Explanations to 2013 Previously Released ACT Math Test

ACT, Inc. is the non-profit organization that administers the ACT college admissions test. They are the only source for official, previously released exams. Practice tests from third-party publishers like Kaplan or McGraw-Hill are just approximations. Fortunately ACT makes freely available previously administered tests. This post addresses the 60 questions in the Math section from [...]

By |2025-12-10T09:01:03-06:00December 10th, 2025|ACT: Answer Explanations|

Answer Explanations to 2015 Previously Released ACT Math Test

ACT, Inc. is the non-profit organization that administers the ACT college admissions test. They are the only source for official, previously released exams. Practice tests from third-party publishers like Kaplan or McGraw-Hill are just approximations. Fortunately ACT makes freely available previously administered tests. This post addresses the 60 questions in the Math section from [...]

By |2026-01-15T05:05:10-06:00December 10th, 2025|ACT Test Prep|
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